<template>
  <a-upload
    name="file"
    listType="picture-card"
    :multiple="isMultiple"
    :action="uploadAction"
    :headers="headers"
    :data="{biz:bizPath}"
    :fileList="fileList"
    :beforeUpload="beforeUpload"
    :disabled="disabled"
    :isMultiple="isMultiple"
    :showUploadList="isMultiple"
    @change="handleChange"
    @preview="handlePreview">
    <img v-if="!isMultiple && picUrl" :src="getAvatarView()" style="height:104px;max-width:300px"/>
    <!--    <img v-else-if="number == fileList.length+1" :src="getAvatarView()" style="height:104px;max-width:300px"/>-->
    <div v-else>
      <a-icon :type="uploadLoading ? 'loading' : 'plus'"/>
      <div class="ant-upload-text">{{ text }}</div>
    </div>
    <a-modal :visible="previewVisible" :footer="null" @cancel="handleCancel()">
      <img alt="example" style="width: 100%" :src="previewImage"/>
    </a-modal>
  </a-upload>
</template>

<script>
  import Vue from 'vue'
  import { ACCESS_TOKEN } from '@/store/mutation-types'
  import { getFileAccessHttpUrl } from '@/api/manage'

  const uidGenerator = () => {
    return '-' + parseInt(Math.random() * 10000 + 1, 10)
  }
  const getFileName = (path) => {
    if (path.lastIndexOf('\\') >= 0) {
      let reg = new RegExp('\\\\', 'g')
      path = path.replace(reg, '/')
    }
    return path.substring(path.lastIndexOf('/') + 1)
  }
  export default {
    name: 'JImageUpload',
    data () {
      return {
        uploadAction: window._CONFIG['domianURL'] + '/sys/common/upload',
        uploadLoading: false,
        picUrl: false,
        headers: {},
        fileList: [],
        previewImage: '',
        previewVisible: false
      }
    },
    props: {
      text: {
        type: String,
        required: false,
        default: '上传'
      },
      /*这个属性用于控制文件上传的业务路径*/
      bizPath: {
        type: String,
        required: false,
        default: 'temp'
      },
      value: {
        type: [String, Array],
        required: false
      },
      disabled: {
        type: Boolean,
        required: false,
        default: false
      },
      number: {
        type: Number,
        required: false,
        default: 0
      },
      isMultiple: {
        type: Boolean,
        required: false,
        default: false
      }
    },
    watch: {
      value (val) {
        if (val instanceof Array) {
          this.initFileList(val.join(','))
        } else {
          this.initFileList(val)
        }
      }
    },
    created () {
      const token = Vue.ls.get(ACCESS_TOKEN)
      this.headers = { 'X-Access-Token': token }
    },
    methods: {
      initFileList (paths) {
        if (!paths || paths.length == 0) {
          this.fileList = []
          return
        }
        this.picUrl = true
        let fileList = []
        let arr = paths.split(',')
        for (var a = 0; a < arr.length; a++) {
          let url = getFileAccessHttpUrl(arr[a])
          fileList.push({
            uid: uidGenerator(),
            name: getFileName(arr[a]),
            status: 'done',
            url: url,
            response: {
              status: 'history',
              message: arr[a]
            }
          })
        }
        this.fileList = fileList
      },
      beforeUpload: function (file) {
        return new Promise((resolve, reject) => {

          let fileType = file.type;
          if(fileType.indexOf('image')<0){
            this.$message.warning('请上传图片');
            return reject(false)
          }
          if(this.number>0 && this.fileList.length >= this.number){
            this.$message.warning('最多只能上传' + this.number + '张图片');
            return reject(false)
          }

          // let fileName = file.name
          // //截取文件名
          // let pointPos = fileName.indexOf('.')
          // fileName = fileName.substring(0, pointPos)
          // //判断文件是否符合正则表达式的规则
          // if (!fileNameRegular.reg.test(fileName)) {
          //   message.error(fileNameRegular.msg)
          //   return reject(false)
          // }
          return resolve(true)

        })
        // var fileType = file.type;
        // if(fileType.indexOf('image')<0){
        //   this.$message.warning('请上传图片');
        //   return false;
        // }
        // if(this.number>0 && this.fileList.length >= this.number){
        //   this.$message.warning('最多只能上传' + this.number + '张图片');
        //   return false;
        // }
      },
      handleChange (info) {
        this.picUrl = false
        let fileList = info.fileList
        if (info.file.status === 'done') {
          if (this.number > 0) {
            fileList = fileList.slice(-this.number)
          }
          if (info.file.response.success) {
            this.picUrl = true
            fileList = fileList.map((file) => {
              if (file.response) {
                file.url = file.response.message
              }
              return file
            })
          }
          //this.$message.success(`${info.file.name} 上传成功!`);
        } else if (info.file.status === 'error') {
          this.$message.error(`${info.file.name} 上传失败.`)
        } else if (info.file.status === 'removed') {
          this.handleDelete(info.file)
        }
        this.fileList = fileList
        if (info.file.status === 'done' || info.file.status === 'removed') {
          this.handlePathChange()
        }
      },
      // 预览
      handlePreview (file) {
        this.previewImage = file.url || file.thumbUrl
        this.previewVisible = true
      },
      getAvatarView () {
        if (this.fileList.length > 0) {
          let url = this.fileList[0].url
          return getFileAccessHttpUrl(url)
        }
      },
      handlePathChange () {
        let uploadFiles = this.fileList
        let path = ''
        if (!uploadFiles || uploadFiles.length == 0) {
          path = ''
        }
        let arr = []
        if (!this.isMultiple) {
          arr.push(uploadFiles[uploadFiles.length - 1].response.message)
        } else {
          for (var a = 0; a < uploadFiles.length; a++) {
            arr.push(uploadFiles[a].response.message)
          }
        }
        if (arr.length > 0) {
          path = arr.join(',')
        }
        this.$emit('change', path)
      },
      handleDelete (file) {
        //如有需要新增 删除逻辑
        console.log(file)
      },
      handleCancel () {
        this.close()
        this.previewVisible = false
      },
      close () {

      }
    },
    model: {
      prop: 'value',
      event: 'change'
    }
  }
</script>

<style scoped>

</style>